Workout B (16 minutes) includes cardio moves that are very simple and low-impact, such as knee lifts and marching, no choreography. You can use light hand weights if you want to add intensity, although your shoulders might fatigue before your large muscles. WorkoutB also includes strength moves such as squats, lunges (while picking up playing cards for a balance challenge), crunches, and pushups. WorkoutC is a full-body workout consisting mostly of muscle endurance with some segments of cardio. The cardio is more complex and intense than in WorkoutB, but not dancy--combinations of marches, squats, and kicks, for example, with or without hand weights.